City of Dallas issued the following announcement on Jan. 23.
The City of Dallas will be performing system maintenance Sunday, January 26, from 3 a.m. to 11 a.m. and Monday, January 27, from 1 a.m. to 5 a.m. While all precautions are being taken to minimize the impact of these outages, you will not able to process online or telephone payments during this time frame. Please accept our apologies for any inconvenience this may cause you. For alternative payment locations, please click here
Original source can be found here.